A.O. Smith G6-PVT4050NV Installation Instructions And Use & Care Manual page 5

IMPORTANT SAFETY INFORMATION
water heater's temperature setting.
• Should overheating occur or the
burner fail to shut off, turn off the
manual gas supply valve to the
water heater and call a qualified
person.
To reduce the risk of unusually hot
water reaching the fixtures in the
house, install Thermostatic Mixing
Valves at each point-of-use.
If anyone in your home is at particular
risk of scalding (for example, the
elderly, children, or people with
disabilities) or if there is a local code
or state law requiring a certain water
temperature at the hot water tap,
these precautions are particularly
important.
According to a national standard
American Society of Sanitary
Engineering (ASSE 1070) and most
local plumbing codes, the water
heater's thermostat should not be
used as the sole means to regulate
water temperature and avoid scalds.
Properly adjusted Thermostatic
Mixing Valves installed at each
point-of-use allow you to set the
tank temperature to a higher setting
without increasing the risk of scalds. A
higher temperature setting allows the
tank to provide much more hot water
and can help provide proper water
temperatures for appliances such as
dishwashers and washing machines.
Higher tank temperatures (140°F) also
kill bacteria that cause a condition
known as "smelly water" and can
reduce the levels of bacteria that
cause water-borne diseases.
Water Contamination Risk
Do not use chemicals that could
contaminate the potable water supply.
Do not use piping that has been
treated with chromates, boiler seal, or
other chemicals.
Fire Risk
This water heater
is equipped with a
Flammable Vapor Ignition Resistance
(FVIR) system. FVIR is designed to
reduce the risk of flammable vapor-
related fires. FVIR makes this product
more sensitive to installation errors or
improper installation environments.
The FVIR system will not prevent a
possible fire/explosion if flammable
vapors have accumulated in the
combustion chamber and the water
heater is lit.
Do not attempt to light this appliance
by any means if you suspect
flammable vapors have accumulated
inside or outside the appliance.
Immediately call a qualified person to
inspect the appliance. Water heaters
subjected to a flammable vapors
incident will show a discoloration
on the flame arrestor and require
replacement of the entire water
heater. Improper installation or an
inadequate air supply can also cause
the FVIR system to disable the water
heater.
WARNING! This water heater has
a resettable thermal switch installed
as part of the FVIR system. Do not
attempt to disable or modify this
feature in any way. Doing so can
lead to fire, explosion or excessive
and abnormal production of carbon
monoxide.
To reduce the risk of a fire that could
result in property damage, or serious
injury or death:
• Do not store things that can burn
easily such as paper or clothes next
to the water heater.
• Do not store or use gasoline or other
flammable substances in the vicinity
of this or any other appliance.
• Keep the water heater from becom-
ing wet. Immediately shut off the
water heater and have it inspected
by a qualified person if you find that
the wiring, gas control valve/ther-
mostat or surrounding insulation
have been exposed to water in any
way (e.g., leaks from plumbing and
leaks from the water heater itself
can damage property and could
cause a fire risk). If the water heater
is subjected to flood conditions or
the gas control valve/thermostat has
been submerged in water, the entire
water heater must be replaced.
• Replace the water heater's viewport
if glass is missing or damaged. Re-
pair the combustion chamber door
seals if damaged.
Explosion Risk
High temperatures and
pressures in the water
heater tank can cause an explosion
resulting in property damage, serious
injury or death. A new Temperature
and Pressure (T&P) Relief Valve is
included with your water heater to
reduce risk of explosion by discharging
hot water. Additional temperature and
pressure protective equipment may
be required by local codes.
A nationally recognized testing
laboratory maintains public inspection
of the valve production process
and certifies that it meets the
requirements for Relief Valves for Hot
Water Supply Systems, ANSI Z21.22.
The T&P Relief Valve's relief pressure
must not exceed the working pressure
rating of the water heater as stated on
the rating plate.
Maintain the T&P Relief Valve
properly. Follow the maintenance
instructions provided by the
manufacturer of the T&P Relief Valve
(label attached to T&P Relief Valve).
If no label is attached to the T&P
Relief Valve, follow the instructions
in the T&P Relief Valve Maintenance
section of this manual. An explosion
could occur if the T&P Relief Valve
Residential Gas Water Heater Use and Care Guide • 5